- Inertia
People don't leave until they have a compelling reason to leave. They will stay put until something pushes them to move. Bad corporate practices are not that strong an effect—boycotting every bad company in 2024 is not a thing people are trying to do, the world doesn't work like that.
- Positive Network Effects
The size and value of Reddit's network still dwarves the fediverse, and that's the primary value of any social network—the people you can interact with.